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Korean population is ageing rapidly; as a result, the number of elderly individuals living in hospitals and nursing homes has increased. As such, caregivers in the hospital and nursing home settings are exposed to musculoskeletal disorders that accompany aging and must help the patients change positions. Skillful transfers are among the most difficult nursing tasks. Therefore, this study aimed to suggest a guideline for the height of a suitable transfer through a usability evaluation of the transfer height between a shower carrier and a bathtub. In this study, height-adjustable experimental equipment for transferring a patient between a shower carrier and a bathtub was constructed. The muscle activity at heights of 65, 70, 75, 80, 85, and 90 cm was measured using a wireless surface electromyography system. In this experiment, a commercially available mobile bed was used with the experimental equipment. Activity was measured in the following 4 muscles: upper trapezius, biceps, triceps, and erector spinae. The results of this study showed the lowest muscle activity at the transfer height of 80cm. Trends in muscle activity changes based on an experiment focusing on caregivers suggested that the suitable transfer height for caregivers was 78– 81cm. As such, the patient’s perspective was not considered in this study. A future usability evaluation will focus on ideal transfer height from the patient’s perspective.

1H1-3 Evaluation of Caregiver’s Transfer Heights by Analyzing Muscle Activity on a Shower-Carrier System